Dietitian or nutritionist — what the difference actually is
"Dietitian" is a protected title in UK law. "Nutritionist" is not. Anyone can call themselves a nutritionist tomorrow with no training at all, while calling yourself a dietitian without being on the Health and Care Professions Council register is a criminal offence.
That is the whole difference, and it is bigger than most people realise.
What a dietitian is
Dietitians are regulated by the HCPC. To use the title they must hold an approved degree, meet standards of proficiency, carry professional indemnity insurance and keep their registration current. You can check any dietitian's registration yourself, free, on the HCPC register — it takes about thirty seconds.
If a dietitian falls below standard, there is a statutory body that can investigate and remove them from practice. That is what "regulated" means in practice: not that they are better people, but that there is somewhere to go when something goes wrong.
Dietitians are the only nutrition professionals qualified to work with people in NHS clinical settings, which is why hospital nutrition teams are dietitians.
What a nutritionist is
"Nutritionist" has no legal protection whatsoever. It covers people with a master's degree in nutritional science and people who did a weekend course online, and the title alone does not distinguish them.
Many nutritionists are well qualified. The Association for Nutrition runs a voluntary register (the UKVRN) with real entry requirements, and someone on it has demonstrated their qualifications to an independent body. But it is voluntary — not being on it does not stop anyone using the title.
So which do you need?
That depends on why you are looking, and it is worth saying plainly that both can be the right answer.
A dietitian is what you need if a doctor has asked you to see one, if your nutrition relates to a diagnosed condition, or if you want the regulated option.
A nutritionist may suit general healthy-eating support, sports nutrition or workplace wellbeing. If you go this route, check what qualification they actually hold and whether they are on the UKVRN.
Neither is a substitute for advice from whoever is treating you.
What it costs
Private dietitian appointments in the UK typically run £60–£120 for a first consultation, usually 45–60 minutes, with follow-ups at £40–£70. Nutritionists vary far more widely because the training does.
Getting it on the NHS
You may not need to pay at all. NHS dietetic services exist across the country and are free at the point of use. Most require a referral from your GP or a consultant, though some areas run self-referral for specific programmes.
Waiting times vary considerably by area. It is worth asking your GP what is available locally before booking privately — and if the wait does not work for you, the private option is still there.
How to check anyone's registration
- Dietitians: hcpc-uk.org → Check the Register → search by name or number
- Nutritionists: associationfornutrition.org → the UKVRN register
Both are free, public, and take under a minute. Any professional will expect to be asked, and one who objects has told you something useful.
Checked August 2026 by Daniel West, respiratory physiotherapist.